D3 Examples - MLS Goals 2014

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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
            "https://www.w3.org/TR/html4/strict.dtd">
<html>
<head>
<title>MLS goals 2014</title>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<link href='https://fonts.googleapis.com/css?family=News+Cycle:400' rel='stylesheet' type='text/css'>
<style>
path {
  stroke: #bbb;
  fill-rule: evenodd;
  cursor:pointer;
}
​
text {
    font-family: 'News Cycle', sans-serif;
    font-size:12px;
    fill:#fff;
    cursor:pointer;
}
</style>
​
</head>
<body>
​
<div id="output"></div>
​
​
<script src="https://cdnjs.cloudflare.com/ajax/libs/d3/3.5.5/d3.min.js"></script>
<script>
​
var width = 960,
    height = 700,
    radius = Math.min(width, height) / 2;
​
var x = d3.scale.linear()
    .range([0, 2 * Math.PI]);
​
var y = d3.scale.linear()
    .range([0, radius]);
​
var color = d3.scale.ordinal()
  .domain(["MLS", "NY", "KC", "LA", "NE", "SEA", "CHV", "SJ", "RSL", "PHI", "POR", "CLB", "DAL", "HOU", "DC", "TOR", "VAN", "COL", "MTL", "CHI"])
  .range(["gray", "firebrick", "lightblue", "navy", "navy", "limegreen", "firebrick", "blue", "darkred", "navy", "darkgreen", "gold", "firebrick", "orange", "black", "firebrick", "navy", "maroon", "blue", "firebrick"]);
​
var svg = d3.select("body").append("svg")
    .attr("width", width)
    .attr("height", height)
  .append("g")
    .attr("transform", "translate(" + width / 2 + "," + (height / 2) + ")");
​
var partition = d3.layout.partition()
    .value(function(d) { return d.goals; });
​
var arc = d3.svg.arc()
    .startAngle(function(d) { return Math.max(0, Math.min(2 * Math.PI, x(d.x))); })
    .endAngle(function(d) { return Math.max(0, Math.min(2 * Math.PI, x(d.x + d.dx))); })
    .innerRadius(function(d) { return Math.max(0, y(d.y)); })
    .outerRadius(function(d) { return Math.max(0, y(d.y + d.dy)); });
​
d3.json("goals.json", function(error, root) {
  var g = svg.selectAll("g")
      .data(partition.nodes(root))
    .enter().append("g");
​
  var path = g.append("path")
    .attr("d", arc)
    .style("fill", function(d) { return color((d.children ? d : d.parent).name); })
    .on("click", click);
​
  var text = g.append("text")
    .attr("transform", function(d) { return "rotate(" + computeTextRotation(d) + ")"; })
    .attr("x", function(d) { return y(d.y); })
    .attr("dx", "6") // margin
    .attr("dy", ".35em") // vertical-align
    .text(function(d) { if (!d.children) { return d.name + " (" + d.goals + ")"} else {return d.name}});
​
  function click(d) {
    // fade out all text elements
    text.transition().attr("opacity", 0);
​
    path.transition()
      .duration(750)
      .attrTween("d", arcTween(d))
      .each("end", function(e, i) {
          // check if the animated element's data e lies within the visible angle span given in d
          if (e.x >= d.x && e.x < (d.x + d.dx)) {
            // get a selection of the associated text element
            var arcText = d3.select(this.parentNode).select("text");
            // fade in the text element and recalculate positions
            arcText.transition().duration(750)
              .attr("opacity", 1)
              .attr("transform", function() { return "rotate(" + computeTextRotation(e) + ")" })
              .attr("x", function(d) { return y(d.y); });
          }
      });
  }
});
​
d3.select(self.frameElement).style("height", height + "px");
​
// Interpolate the scales!
function arcTween(d) {
  var xd = d3.interpolate(x.domain(), [d.x, d.x + d.dx]),
      yd = d3.interpolate(y.domain(), [d.y, 1]),
      yr = d3.interpolate(y.range(), [d.y ? 20 : 0, radius]);
  return function(d, i) {
    return i
        ? function(t) { return arc(d); }
        : function(t) { x.domain(xd(t)); y.domain(yd(t)).range(yr(t)); return arc(d); };
  };
}
​
function computeTextRotation(d) {
  return (x(d.x + d.dx / 2) - Math.PI / 2) / Math.PI * 180;
}
​
</script>
​
​
</body>
</html>
    